Fixed LPC1114 InterruptIn for Port1 (and higher)

Channel was only calculated using bits set, port number was ignored.

Author: Sissors

libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_irq_api.c

@@ -47,7 +47,7 @@ static inline void handle_interrupt_in(uint32_t port) {
     LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (port * 0x10000)));
 
     // Get index of function table from Mask Interrupt Status register
-    channel = numofbits(port_reg->MIS - 1);
+    channel = numofbits(port_reg->MIS - 1) + (port * 12);
 
     if (port_reg->MIS & port_reg->IBE) {
         // both edge, read the level of pin